Re: Same MAC on different VLANs?

From: Tim Fletcher (tim@fletchmail.net)
Date: Sat Apr 12 2003 - 09:02:32 GMT-3


Mike,

The CAM tables are different for each vlan. I used to run a network with several Local Directors, and almost every device (approx. 200) on those IP segments would show up in 3 or 4 different vlans.

-Tim Fletcher

At 11:17 PM 4/11/03 -0500, Mike Williams wrote:
>I know this sounds silly, but does it mess up the switching process when
>a switch learns the same MAC on two different VLANs? I have an
>incredibly long and detailed story behind my asking this question, but I
>won't bore everyone.
>
>I mean, do switches keep separate CAM tables per VLAN? Or is there one
>large shared CAM table? Where can I find more info on precisely how
>these switches create and operate the CAM tables and the switching
>process? (In particular the 4000/4500 and 6500 switches, both with IOS,
>no CatOS)
>
>TIA
>Mike W.



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